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Once a view has been created from a physical table, it can then be used to modify the view’s data of a single underlying table. Essentially when a view is updated the changes pass through the view to the underlying base table. A view designed in this manner is called an updatable view and can have INSERT, UPDATE, and DELETE operations performed into the single table from which it’s constructed.

Because views are dependent on getting their data from a base table and have no physical existence of their own, you should exercise care when constructing an updatable view. Although useful in modifying the rows in a table, updatable views do have a few limitations that programmers and users should be aware of.

First, an updatable ...

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